package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */

    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO 员工信息
     * @return
     */

    public void add(EmployeeDTO employeeDTO) {
        //将DTO转换为数据库实体类
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        //补充DTO中没有的信息
        //设置默认密码,转换成MD5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置状态为可用
        employee.setStatus(StatusConstant.ENABLE);
//        //补充时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        //设置创建者
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);

    }

    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult queryByPage(EmployeePageQueryDTO employeePageQueryDTO) {
        //使用pagehelper分页插件
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.queryByPage(employeePageQueryDTO.getName());
        //封装到对象
        PageResult pageResult = new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    /**
     * 启用、禁用员工账号
     *
     * @param status 是否启用，从路径获取
     * @param id     从地址栏获取
     * @return
     */
    @Override
    public void enableOrDisable(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id).build();
        employeeMapper.update(employee);
    }

    /**
     * 编辑员工信息
     *
     * @param employeeDTO 编辑信息
     * @return
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //将编辑信息拷贝到实体类中用于存储
        BeanUtils.copyProperties(employeeDTO, employee);
//        //从JWT令牌中获取
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }

    /**
     * 根据员工id查询信息
     *
     * @param id 员工id
     * @return
     */
    @Override
    public Employee queryById(Long id) {
        Employee employee = employeeMapper.queryById(id);
        return employee;
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     * @return
     */
    @Override
    public void edit(PasswordEditDTO passwordEditDTO) {
        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        Employee employee = employeeMapper.queryById(BaseContext.getCurrentId());
        //如果用户不存在，抛异常
        if (Objects.isNull(employee)) {
            throw new PasswordErrorException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        //如果密码不一样，抛异常
        if (!oldPassword.equals(employee.getPassword())) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        //修改密码
        Employee newEmployee = Employee.builder()
                .id(employee.getId())
                .password(newPassword)
                .build();
        employeeMapper.update(newEmployee);
    }
}
